Furniture
A mattress is bought in ten minutes and used for ten thousand nights. Firmness is not a quality rating; it's a fit to your body weight and sleeping position.
A few questions about your situation, not about the product.
Answer all 4 questions to see the spec sheet to shop with.
How much you sink in, usually scored 1–10.
Why it matters
Side sleepers need give at shoulder and hip; back and stomach sleepers need support to keep the spine level.
What to check
Heavier bodies experience the same mattress as softer — size firmness up with weight.
How much material is in the foam.
Why it matters
Low-density foam sags into a body-shaped hollow within two years.
What to check
Memory foam under 40 kg/m³ or PU base foam under 32 kg/m³ is a short-life mattress.
Three very different support systems.
Why it matters
Memory foam hugs and isolates motion; latex is bouncy, cool and durable; pocket springs give airflow and edge support.
What to check
Memory foam runs hot in warm climates unless it's gel-infused or open-cell.
Whether a partner turning wakes you, and whether the edge collapses when you sit.
Why it matters
The two things couples complain about most, and neither is on the price tag.
What to check
Cheap pocket springs skip the reinforced perimeter.
Total height of the mattress.
Why it matters
6 inches suits light single sleepers; 8–10 inches suits most adults; heavier bodies need 10+.
What to check
Thickness without density is meaningless — thick cheap foam still sags.
Nights you can return it, and what 'sagging' the warranty actually covers.
Why it matters
Bodies need 2–3 weeks to adapt; a 10-night trial proves nothing.
What to check
Warranties often only cover sag deeper than 1–1.5 inches, measured unweighted.
Foam density and warranty terms tell you more about longevity than the brand does.
